Can my gallery not break line? My website becomes a mess

I use the shortcode inside a boostrap collapse class but the same thing happens when i insert the shortcode just as it is

Hello csandreas1

Can you provide us with the link page where is inserted our plugin?

Thank you.

i am at localhost yet

when i remove the boostrap code the problem is fixed but i want that collapse thing, which is great with boostrap
here is a print screen

View post on imgur.com

Hello csandreas1,

Do you use Page Builder, as the problem is individual please contact the support team via this email: [email protected]. They will help you.

Thank you.